Vertically-adjustable grate



(No Model.) 2 SheetsSheet 1. J. MONAMARA 85' G. COTTON.-

VERTIGALLY ADJUSTABLE GRATE.

Patented Apr; 9,18%;

INVENTORS 3 W mm m n A n n my wa m WIITNESSES: (flaw/07L (NoMofieL) 2Sheets--Sheet 2. J. MONAMARA & C.'UOTTON.-

VERTIGALLY ADJUSTABLE GRATE.

PatentedApr. 9, 1895.

INVENTORS JZfin 1 73 namarcz. Cameron 0o 230w WZNESSES:

ATTO R N EYS.

0" WASHINGTON D c UNITED STATES PATENT OFFICE.

JOHN MONAMARA AND OAMERON COTTON, OF BATH, NEW YORK.

VER TlCALLY-ADJ USTABLE G RATE.

SZPEOIFICATION forming part of Letters Patent No. 537,221, dated April9, 1895.

Application filed January 14, 1896.

T0 aZZ whom it may concern.-

Be it known that we, JOHN MCNAMARA and CAMERON COTTON, of Bath, in thecounty of Steuben, in the State of New York, have invented new andusefullmprovements in Vertically-Adjustable Grates, of which thefollowing, taken in connection with the accompanying drawings, is -afull, clear, and exact description.

This invention relates to improvements in stoves and more particularlyto the grates thereof.

Our object is to produce a grate which is adapted to be adjustedvertically, so that the bed of coals or fire pot may be raised orlowered as desired, for the purpose of regulating the amount of heat tosuit the convenience of the operator. We have found by experience thatit often happens that when the fire is nearly consumed and there remainsonly a small bed of coals just over the grate, it is desired to revivethe fire suificient to do a small amount of cooking, and to do this itis necessary to practically build a new fire, but by arranging thegrates adjustable vertically, the fire may be raised to a point justunder the apertures so as to get the benefit of all of the heat thatthere is so as to avoid the necessity of re-kindling the fire; and tothat end our invention consists in the several new and novel featuresand combination of parts hereinafter described, and which arespecifically set forth in the claims hereunto annexed. It is constructedas follows, reference being bad to the accompanying drawings, in which-Figure 1 is a side view of the forward end of a stove with ourimprovements attached. Fig.' 2 is a view of a vertical section justinside of the outer casing of the stove. Fig. 3 is a transverse verticalsection on line acw of Fig. 2. Fig. 4 shows a side view of the devicefor locking one of the arbors and thus holding the grates in any heightdesired. Fig. 5 is a front end view thereof. Figs. 6 and 7 are end viewsof the rotating shafts having cogs on their ends for the purpose ofraising and lowering the grates.

-A is a stove of any ordinary construc tion, provided with a stationaryfire box B in its front end in any ordinary way.

a are grates preferably of theDockash form, although we do not confineourselves to Serial No. 584,754- (No model.)

this particular kind of grate, as it will be evi= Y dent that any formof grate may be used as desired.

-a'- is a movable frame in which the grate -a is mounted and just belowthe grate is mounted a shaft b having cogs b mounted eccentricallythereon at either end and preferably within the frame. Just below thisshaft-b is a similar shaftc mounted in the lower part of the frame,within which the frame a, moves vertically, said shaft cbeing alsoprovided with similar cogs -c-1 eccentrically mounted and adapted toengage with the aforesaid cogs b. One end of the shaft -c extends outthrough the fire box and casing to the exterior of the stove where itmay berotated by a handle dor in any other manner desired; that part ofthe shaft extending from the cog to the outer face of the stove be= ingrectangular, so that the key 'C-, constructed substantially as shown inthe drawings, having a recess in its lower end =d'-- may drop throughsaid rectangular portion of the shaft c and hold it from furtherrotation.

It will be observed that when the shaft cis rotated the cogs normallybeing in position, as shown in Fig. 6, will engage with the cogs uponthe shaft b and throw the shaft b upward as the cogs take the positionshown in Fig; 7, and inasmuch as the shaft .cis fixed it willnecessarily throw the shaft b upward, which is journaled in thevertically moving frame and thus throw the grate up near the top of thestove.

eare vertical slot-ways in which the extending ends of the grate areadapted to travel. The key'-C is mounted in a slotway e-- in the outercasing of the stove and adapted to drop down and engage with p therectangular end of the shaft 'c, so that it may hold it from rotation atany'point desired and thus hold the grate to any height desired.

f-- is a shield located overthe cogs -b'-- and --c'--- for the purposeof keeping the c'linkers from falling on them.

Having described our invention, what we claim, and desire to secure byLetters Patent, is-

In a stove, the stationary fire box, a verti IOO cally adjustable frameplaced inside of its plied to one end of one of the shafts subto loweredge, and carrying the grate bars; and stantially as shown.

the stove frame provided with suitable slots, In witness whereof we havehereunto set combined with a shaft that is journaled in the our hands onthis 10th day of December, 1894. vertically adjustable grate, a secondshaft JOHN MCNAMARA.

jonrnaled in the stationary fire box, and pro- CAMERON COTTON.videdwithan operating handle at oneend, In presence ofgears attachedeccentrically to the shafts and JESSIE E. MURRAY,

meshing together, and a locking device apl HOWARD P. DENISON.

